• Madalpingelised elektripaigaldised. Osa 4-43, Kaitseviisid. Liigvoolukaitse = Low-voltage electrical installatios. Part 4-43, Protection for safety. Protection against overcurrent (IEC 60364-4-43:2008, modified + corrigendum Oct. 2008)2010 https://www.ester.ee/record=b2636403*est